Final answer:
The therapist should consult with the minor's legal guardian before sharing any information with the parent who does not have sole legal custody.
Step-by-step explanation:
In this scenario, the therapist should consult with the minor's legal guardian before sharing any information with the parent who does not have sole legal custody. The therapist has a professional duty to prioritize the confidentiality and privacy of the minor and must adhere to legal and ethical guidelines. By consulting with the legal guardian, the therapist can ensure that any decision regarding sharing information is made in the best interest of the minor.